Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rieger & Dietz O H GfiledCriticalRieger & Dietz O H G
Application grantedgrantedCritical
Publication of AT223960BpublicationCriticalpatent/AT223960B/de